The Collaborative International Dictionary of English v.0.48:
Dentifrice \Den"ti*frice\, n. [L. dentifricium; dens, dentis, tooth + fricare to rub: cf. F. dentifrice. See Tooth, and Friction.] A powder or other substance to be used in cleaning the teeth; tooth powder. [1913 Webster]WordNet (r) 3.0 (2006):
dentifrice n 1: a substance for cleaning the teeth; applied with a toothbrush